import json

from django.core import signing
from django.utils.encoding import smart_text

from django_select2.cache import cache
from django_select2.forms import ModelSelect2Widget
from tests.testapp.forms import (
    AlbumModelSelect2WidgetForm, ArtistCustomTitleWidget
)
from tests.testapp.models import Genre

try:
    from django.urls import reverse
except ImportError:
    from django.core.urlresolvers import reverse


class TestAutoResponseView:
    def test_get(self, client, artists):
        artist = artists[0]
        form = AlbumModelSelect2WidgetForm()
        assert form.as_p()
        field_id = signing.dumps(id(form.fields['artist'].widget))
        url = reverse('django_select2:auto-json')
        response = client.get(url, {'field_id': field_id, 'term': artist.title})
        assert response.status_code == 200
        data = json.loads(response.content.decode('utf-8'))
        assert data['results']
        assert {'id': artist.pk, 'text': smart_text(artist)} in data['results']

    def test_no_field_id(self, client, artists):
        artist = artists[0]
        url = reverse('django_select2:auto-json')
        response = client.get(url, {'term': artist.title})
        assert response.status_code == 404

    def test_wrong_field_id(self, client, artists):
        artist = artists[0]
        url = reverse('django_select2:auto-json')
        response = client.get(url, {'field_id': 123, 'term': artist.title})
        assert response.status_code == 404

    def test_field_id_not_found(self, client, artists):
        artist = artists[0]
        field_id = signing.dumps(123456789)
        url = reverse('django_select2:auto-json')
        response = client.get(url, {'field_id': field_id, 'term': artist.title})
        assert response.status_code == 404

    def test_pagination(self, genres, client):
        url = reverse('django_select2:auto-json')
        widget = ModelSelect2Widget(
            max_results=10,
            model=Genre,
            search_fields=['title__icontains']
        )
        widget.render('name', None)
        field_id = signing.dumps(id(widget))

        response = client.get(url, {'field_id': field_id, 'term': ''})
        assert response.status_code == 200
        data = json.loads(response.content.decode('utf-8'))
        assert data['more'] is True

        response = client.get(url, {'field_id': field_id, 'term': '', 'page': 1000})
        assert response.status_code == 404

        response = client.get(url, {'field_id': field_id, 'term': '', 'page': 'last'})
        assert response.status_code == 200
        data = json.loads(response.content.decode('utf-8'))
        assert data['more'] is False

    def test_label_from_instance(self, artists, client):
        url = reverse('django_select2:auto-json')

        form = AlbumModelSelect2WidgetForm()
        form.fields['artist'].widget = ArtistCustomTitleWidget()
        assert form.as_p()
        field_id = signing.dumps(id(form.fields['artist'].widget))

        artist = artists[0]
        response = client.get(url, {'field_id': field_id, 'term': artist.title})
        assert response.status_code == 200

        data = json.loads(response.content.decode('utf-8'))
        assert data['results']
        assert {'id': artist.pk, 'text': smart_text(artist.title.upper())} in data['results']

    def test_url_check(self, client, artists):
        artist = artists[0]
        form = AlbumModelSelect2WidgetForm()
        assert form.as_p()
        field_id = signing.dumps(id(form.fields['artist'].widget))
        cache_key = form.fields['artist'].widget._get_cache_key()
        widget_dict = cache.get(cache_key)
        widget_dict['url'] = 'yet/another/url'
        cache.set(cache_key, widget_dict)
        url = reverse('django_select2:auto-json')
        response = client.get(url, {'field_id': field_id, 'term': artist.title})
        assert response.status_code == 404